11231431129 has 2 divisors, whose sum is σ = 11231431130. Its totient is φ = 11231431128.

The previous prime is 11231431109. The next prime is 11231431151. The reversal of 11231431129 is 92113413211.

11231431129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10790431129 + 441000000 = 103877^2 + 21000^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231431129 - 2¹¹ = 11231429081 is a prime.

It is a super-2 number, since 2×11231431129² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11231431097 and 11231431106.

It is not a weakly prime, because it can be changed into another prime (11231431109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5615715564 + 5615715565.

It is an arithmetic number, because the mean of its divisors is an integer number (5615715565).

Almost surely, 2^11231431129 is an apocalyptic number.

It is an amenable number.

11231431129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11231431129 is an equidigital number, since it uses as much as digits as its factorization.

11231431129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The spelling of 11231431129 in words is "eleven billion, two hundred thirty-one million, four hundred thirty-one thousand, one hundred twenty-nine".